engineering physics MCQ #46

The reactance of a capacitor at 50 Hz is 20 Ω. At 100 Hz, it is

engineering physics MCQ #46

  1. Question 1

    Q1. The reactance of a capacitor at 50 Hz is 20 Ω. At 100 Hz, it is

    • A) 10 Ω
    • B) 20 Ω
    • C) 40 Ω
    • D) 80 Ω

    Answer: 10 Ω

    Explanation: XC = 1/(ωC), so XC ∝ 1/f. Thus, XC at 100 Hz = 20 * (50/100) = 10 Ω.